<template>
  <div class="">
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"> </el-alert>

      <!-- 进度条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- Tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        class="demo-ruleForm"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input type="number" placeholder="number" v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input type="number" v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input type="number" v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <!-- 循环渲染复选框 -->
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>

            <!-- 图片预览窗口 -->
            <el-dialog title="商品图片" :visible.sync="PriviewVisible" width="50%">
              <img :src="priviewPath" alt="" class="priviewImg" />
            </el-dialog>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 副文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
  </div>
</template>
<script>
// 导入lodash
import _ from 'lodash'

export default {
  name: '',
  props: {},
  components: {},
  data() {
    return {
      // 选中的标题索引
      activeIndex: '0',
      // 表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类的选中项
        goods_cat: [],
        // 上传图片的临时路径
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        // 商品的参数（数组）包含动态参数和静态属性
        attrs: []
      },
      // 表单验证规则
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: '请输入商品名称',
            trigger: 'blur'
          }
        ],
        goods_price: [
          {
            required: true,
            message: '请输入商品价格',
            trigger: 'blur'
          }
        ],
        goods_weight: [
          {
            required: true,
            message: '请输入商品重量',
            trigger: 'blur'
          }
        ],
        goods_number: [
          {
            required: true,
            message: '请输入商品数量',
            trigger: 'blur'
          }
        ],
        goods_cat: [
          {
            required: true,
            message: '请选择商品分类',
            trigger: 'blur'
          }
        ]
      },
      // 保存获取到的商品数据
      catelist: [],
      // cascader的配置选项
      cateProps: {
        expandTrigger: 'hover',
        // label指向所选分类名字
        label: 'cat_name',
        // value指向所选分类id
        value: 'cat_id',
        children: 'children'
      },
      // 保存动态参数列表的数据
      manyTableData: [],
      // 保存静态属性列表的数据
      onlyTableData: [],
      // 上传图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 设置上传的请求头部
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 保存的图片URL
      priviewPath: '',
      // 图片预览的显示与隐藏
      PriviewVisible: false
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  watch: {},
  methods: {
    // 获取所有商品数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品数据失败')
      }
      this.$message.success('获取商品数据成功')
      this.catelist = res.data
    },
    // 级联选择器选中项发生变化，触发此函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      // 如果选中的标题不是三级标题的话让所属值为空数组
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：' + oldActiveName)
      // console.log('即将进入的标签页名字是：' + activeName)
      // return false
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked() {
      // console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        // console.log('动态参数面板')
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        // 遍历res.data 并将attr_val分解为数组
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        console.log(res.data)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态参数失败')
        }
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片的预览效果
    handlePreview(file) {
      console.log(file)
      this.priviewPath = file.response.data.url
      this.PriviewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1.获取到要移除图片的路径
      const filePath = file.response.data.tmp_path
      // 2.在addForm.pics数组中，找到这个图片所对应的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath)
      // 3.调用数组的splice方法，把图片信息对象，从pics中删除对应的图片路径
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传成功的事件（钩子）
    handleSuccess(response) {
      // console.log(response)
      // 1.拼接到一个图片信息对象
      const picsInfo = { pic: response.data.tmp_path }
      // 2.将图片信息对象，推到addForm中的pics数组中
      this.addForm.pics.push(picsInfo)
      // console.log(this.addForm)
    },
    // 添加 商品
    add() {
      console.log(this.addForm)
      // 对整个表单进行预验证
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // lodash  cloneDeep(obj) 深拷贝一份form
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = this.addForm.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态参数
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理完毕 传给新的克隆对象form
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发送请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        // 通过编程式导航进行跳转到goods页面
        this.$router.push('/goods')
      })
    }
  },
  created() {
    this.getCateList()
  },
  mounted() {},
  beforeDestroy() {}
}
</script>
<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0;
}
.priviewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
